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Original question:

RF37S114: Android NFC communication with RF37S114HTFJB

RF37S114: RF37S114

dragan vasic
Prodigy 10 points
Part Number: RF37S114


Hallo,

I try to read the RF37S114HTFJB transponder with metal near to transponder. It does not work.

Without metal reading is OK. I have good experience with anti-metal foils with some another tags but it did not help me with   RF37S114HTFJB.

Is there some anti-metal solution, at all, you can suggest ?

Regards.

  • 0
    TI__Guru*** 135355 points

    Hello Dragan,

    First off, as you seem to be aware in general, that sort of metal inference is typical for HF RFID as a whole. The whole communication relies on inductive coupling and magnetic fields, so metal will always seriously impact it.

    Now taking that general impact from a physics standpoint and applying it to the 4x4mm tag which already has very limited read range due to the small tag size (1-1.5cm typ.), and you get the issue you are seeing...

    The idea of using ferrite sheets and other anti-metal methods are great to limit the impacts from metal surfaces and allow for tags to operate once again at some level, but in those cases, the performance is cut back a lot from what you would get in free space. With the RF37S114, I would expect those performance dips result in the tag being unreadable.

    From my perspective and with the experience I have with RFID, I really don't think there would be a viable solution here unfortunately. That tag just was not designed to be used around metal at all, and in general I expect any extremely small form factor HF RFID tag to have such issues.